US Bridges

I-15 (SR-15) over 1100 West St. (main St.)

Fair

Davis County, Utah · 0.7 Mi.No. Center St.-Nsl · Structure no. 0C 803

Built
1997
28 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
154 ft
1 main span
Daily traffic
164,022
2017 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) over 1100 West St. (main St.) is a steel stringer/multi-beam or girder carrying I-15 (SR-15) over 1100 West St. (main St.) in Davis County, Utah. It was built in 1997, so it is 28 years old, younger than the Utah average of 40.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 164,022 vehicles a day, roughly 9% of them trucks, projected to reach 196,826 by 2037. The structure is 154 ft (46.8 m) long and 175 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-15 (SR-15)
Crosses1100 West St. (main St.)
Location0.7 Mi.No. Center St.-Nsl
RouteInterstate 15
CountyDavis County
StateUtah
Coordinates40.85, -111.91194
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating67.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length154 ft (46.8 m)
Longest span148 ft (45 m)
Deck width175 ft (53.3 m)
Roadway width168 ft (51.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic164,022 (2017)
Projected traffic196,826 by 2037
Trucks9%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-15 (SR-15) over 1100 West St. (main St.) built?

It was built in 1997, making it 28 years old in 2025.

What condition is I-15 (SR-15) over 1100 West St. (main St.) in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does I-15 (SR-15) over 1100 West St. (main St.) carry?

About 164,022 vehicles per day (2017 count), of which roughly 9% are trucks.

How long is I-15 (SR-15) over 1100 West St. (main St.)?

The structure is 154 ft (46.8 m) long with a longest span of 148 ft (45 m) and a deck 175 ft wide.

Who owns I-15 (SR-15) over 1100 West St. (main St.)?

It is owned by the State Highway Agency.